Step 2: Making the Blade

Start by tracing out the pattern for your blade in pencil on the foam board. My base was about 1 5/16 in. and about 8 1/2 in. tall.

Then, cut out your blade using your knife. Use a ruler to give it a nice, straight edge.

Take it outside and give it a nice coat of silver spray paint. Don't over do it though! You don't want any runs. I found that foam board dries surprisingly quickly, so by the time I got it back up to my dorm, it was already dry to touch. Once one side is dry, flip it over and do up the other side.

Now let it all dry for a bit while you work on the arm part.

Step 3: Working on the Arm Bracelet Thing

The next thing you're going to want to do is make the part that stays on your arm and launches the blade. Start by taking your toilet paper tubes and cutting them in half from top to bottom (see picture). I found it helps if you score it lightly a few times before cutting it.

Set one aside and put the other two together.

Cut/poke a small slit through both rolls, about big enough for a brass fastener. Insert said fasteners.

:D :D :D :D :D I made one! I used some scrap cardboard, tape, key rings, a rubber band, and hot glue. That stick thing connected to the rubber band is connected to the blade. It rest in the notch in the back so the blade won't move. Then I hit the stick out of the notch and the blade shoots out. Nice for one day of work eh?

Very cool! I like the key rings. It makes it look more like a wrist thing with buckles. I was actually going to make a switchblade type thing for a movie I'm doing soon. Glad to know that the notch method works with the rubber bands like that.

You guys should try using the following items & see where you get with these little instructions, I made one & it held up. Try those white retractable curtain rods so it can be retractable; Eat all of these & use the can:[ http://pirouline.com/product/Creme_de_Pirouline_-_Chocolate_Hazelnut_3.25_oz_Tins_-_Pack_of_12/13341.aspx ] to attach the retractable curtain rod into & cover your wrist, I recommend using electrical tape but duct tape has worked alright as well. Use a pair of pliers to stick a double edged blade (or whatever type of blade you prefer for it's purpose)into the curtain rod. From there on just work on it to make it more comfortable for wearing. :D Remember be safe & stay out of trouble with this thing, it's very dangerous.

I reinforced the edges of my blade with super glue (not hot glue). For the blade its self I used a really strong cardboard from a UPS package. The glue dribbled into the gaps in the side of the cardboard, makeing it stronger on the inside too.

Wow! I had all the supplies I needed and made one myself. I made it longer so it can be hidden very well and it fits under my sleeve without being noticed! I made a few very slight modifications; I did not use a paper clamp as opposed to a brad. Instead, for the bottom brad I folded it down and taped it. When I pull the blade back behind the, er, cardboard sleeve, it catches on the back, locking. So I pull that back a bit and let it go and it pops right out! It has enough momentum to get to the front of the glove, so the top brad catches on the front, locking. It's hard to explain but.. xD

I'm working on trying to make it pop out with a flick of the wrist like in the games.